Endurance Fuel Hub – The Complete Guide to Going Long fuelling
Whether you’re training for a marathon, tackling a century ride, or racing an iron-distance triathlon, getting your endurance fuel right is the difference between a strong finish and hitting the wall. This hub brings together Hammer Nutrition UK’s core long-distance fuels — and the expert guides to use them effectively.
Every product here is formulated without refined sugars, artificial colours, or proprietary blends. Just clean, science-backed endurance nutrition trusted by athletes for nearly forty years.
Core Endurance Fuels
Hammer Gel – Fast-Acting Energy Gel for Endurance Athletes
Hammer Gel is one of the UK’s most trusted energy gels for long-distance running and cycling. Formulated with complex carbohydrates rather than simple sugars, it delivers fast, sustained energy without the spike-and-crash cycle that derails so many race-day performances.
Available in single-serve sachets and economy jugs — ideal for high-volume training blocks.
Best for: Runs and rides under 3 hours | Race-day top-ups | Athletes sensitive to sugar spikes
Shop Hammer Gel → | Shop Hammer Gel Jug →
HEED – Endurance Sports Drink for Steady Energy
HEED (High Energy Electrolyte Drink) is a low-osmolality endurance sports drink that combines complex carbohydrate energy with a complete electrolyte profile. Unlike most sports drinks, HEED contains no citric acid, making it significantly gentler on the stomach during long efforts. It’s the ideal cycling hydration drink or marathon training companion when you need energy and electrolytes in one bottle.
Best for: Long training rides | Hot weather racing | Athletes prone to GI distress
Perpetuem – The Ultimate Long-Distance Endurance Fuel
When your effort exceeds three hours, your body needs more than carbohydrates alone. Perpetuem is Hammer Nutrition’s flagship long-distance fuel, combining complex carbohydrates, soy protein, and healthy fat in a ratio designed to mirror how your body actually burns fuel during prolonged exercise. It’s the go-to choice for ultra marathon nutrition, iron-distance triathlon fuelling, and multi-hour cycling events.
Best for: Efforts over 3 hours | Ultras and iron-distance racing | Athletes wanting an all-in-one fuel
Perpetuem Solids – Chewable Long-Distance Fuel
All the endurance-sustaining benefits of Perpetuem in a solid, chewable tablet. Perpetuem Solids are ideal for athletes who prefer real-food texture during long efforts, or when carrying liquid fuel isn’t practical — such as during trail runs, mountain bike events, or multi-sport transitions.
Best for: Trail running | Events with limited fluid access | Athletes who prefer solid fuel
Endurance Fuel Kits – The Smart Starting Point
Not sure which endurance fuel is right for your sport or effort duration? Our curated fuel kits let you sample multiple products at a lower cost — so you can dial in your nutrition strategy before race day, not during it.
- Short Distance Fuel Kit – Optimised for races and training sessions under 2–3 hours. Includes Hammer Gel and HEED to cover your energy and hydration needs.
- Endurance Starter Kit – The complete introduction to Hammer Nutrition. Ideal for athletes new to structured endurance fuelling or switching from sugar-based products.
Endurance Fuelling Guides
Fuelling is a skill — and like any skill, it improves with knowledge and practice. These sport-specific guides cover the science and strategy behind endurance nutrition, so you arrive at the start line with a proven plan.
Triathlon Nutrition Guides
- How to Fuel: Olympic Distance Triathlon – Energy and hydration strategy for sprint-to-Olympic distance racing
- How to Fuel: Half or Full Iron Distance Triathlon – Long-course fuelling from swim start to finish line
Cycling Nutrition Guides
- How to Fuel: Cycling Criteriums (Crits) – High-intensity, short-duration race fuelling strategy
- How to Fuel: Multi-Day Cycling Stage Races – Recovery and fuelling across consecutive race days
Why Hammer Nutrition UK?
Hammer Nutrition has been formulating endurance-specific nutrition since 1987 — long before clean-label became a marketing trend. Every product is built around one principle: fuel your body the way it actually works, with complex carbohydrates, no refined sugars, and the precise electrolyte balance to keep you performing from start to finish.
No proprietary blends. No artificial colours. No compromises. Just endurance fuel that works.
Frequently Asked Questions – Endurance Fuel
What is the best endurance fuel for long-distance running?
For runs under 3 hours, Hammer Gel every 45–60 minutes is the standard approach. For efforts over 3 hours, switch to Perpetuem, which adds protein and fat to sustain energy output and reduce muscle breakdown over many hours.
What is the difference between Hammer Gel and Perpetuem?
Hammer Gel is a carbohydrate-only gel designed for efforts up to 3 hours. Perpetuem adds soy protein and healthy fat, making it the superior choice for ultra-distance events where carbohydrate-only fuelling breaks down.
Is HEED better than regular sports drinks?
Yes — for endurance athletes. Most commercial sports drinks use simple sugars and citric acid, which can cause GI distress during long efforts. HEED uses complex carbohydrates, contains no citric acid, and includes a full electrolyte profile — making it significantly gentler on the stomach over long rides and runs.
What are Perpetuem Solids and when should I use them?
Perpetuem Solids are chewable tablets containing the same carbohydrate, protein, and fat formula as liquid Perpetuem. Ideal when carrying liquid fuel isn’t practical — trail runs, mountain bike events, or multi-sport transitions.
How much should I eat per hour during an endurance event?
Most endurance athletes perform best consuming 120–180 calories per hour. Start at the lower end and adjust based on intensity and conditions. Consistent, conservative fuelling from the first hour beats reactive eating every time.
Are Hammer Nutrition products suitable for vegans?
Hammer Gel, HEED, and Perpetuem Solids are vegan-friendly. Perpetuem contains soy protein and is suitable for vegetarians. Check individual product pages for full ingredient details.